Questions and Answers
On which network is Computer 2 with IP address 10.1.1.205?
NOT Network C
For what purpose would Computer 1 send a FF:FF:FF:FF:FF broadcast ARP message to all nodes on Network A?
NOT: To obtain Computer 2 MAC address
Which layer constructs the Ethernet frame?
Data Link Layer
What information is in the data payload for the IP datagram?
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What information needs to be in the destination MAC address when sending from Router Y to Router Z?
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What's the first step that Router Z does after receiving the Ethernet frame?
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If the TTL value was set to 64 at the beginning, what is the value of the TTL once it reaches its destination?
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What information for the fourth TCP segment of data is relevant when Computer 1 sends a request to Computer 2 on port 80?
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Which of the following has the correct IP datagram information for Computer 1 on network B sending to Computer 2?
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When referring to RJ45, we are referring to ________.
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What information is Computer 1 looking at in the ARP table on Router Y?
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Which layer constructs the IP datagram?
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What information is in the payload section of the TCP segments?
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What information needs to be in the destination MAC address when sending from computer 1 to its gateway?
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What's the second step that Router Z does after receiving the Ethernet frame?
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If the TTL value was set to 64 at the beginning for Computer 1, what is the value of the TTL once it reaches its destination?
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What information for the first TCP segment is correct when Computer 1 sends FTP request to Computer 2?
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Which of the following has the correct IP datagram information for Computer 1 on network B sending to Computer 2?
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Study Notes
Network Addressing
- Computer 1 on Network B (IP: 192.168.1.233) targets Computer 2 (IP: 10.1.1.205) located on a different network than its own.
- Computer 1 on Network C (IP: 172.16.1.57) aims to communicate with Computer 2 (IP: 172.16.1.133), with a Time to Live (TTL) value remaining unchanged at 64 upon arrival.
ARP Messaging
- Sending a broadcast ARP message (FF:FF:FF:FF:FF) allows Computer 1 to gather network node information; not exclusively to acquire the MAC address of Computer 2.
- Computer 1 checks the ARP table of Router Y for the corresponding MAC address of the desired IP address.
Layer Functions
- The Data Link Layer is responsible for constructing the Ethernet frame.
- The Network Layer constructs the IP datagram, ensuring correct packet delivery.
- The payload of the IP datagram typically contains the TCP segment, which includes important application data.
Packet Destination
- To send packets to Router Z, the Ethernet datagram requires Router Z's MAC address as the destination.
- When communicating with Router Y, Computer 1 must use Router Y's MAC address in the Ethernet datagram.
TCP Segment Information
- For FTP communication initiated by Computer 1 on network A, the TCP segment information includes:
- Source Port: 21086
- Destination Port: 21
- Sequence Number: 1
- Acknowledgment Number: 2
- In web server requests, specifying the correct source and destination ports ensures proper routing on the target machine.
Ethernet Frame Reception Process
- Upon receiving an Ethernet frame, Router Z first calculates a checksum to verify the frame's integrity against the header's checksum.
IP Datagram Fields
- Critical fields in the IP datagram for Computer 1 on Network B targeting Computer 2 include:
- Version: 4
- Minimum Header Length: 20
- Source IP Address: 192.168.1.121
- Destination IP Address: 172.16.1.57
RJ45 Reference
- RJ45 refers specifically to the cable plug, a crucial connector in Ethernet networking.
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Description
Test your understanding of the Five-Layer Network Model with this quiz. Answer questions on IP addressing and ARP message broadcasting. Perfect for students studying networking concepts and protocols.
